The U.S. Postal Service will implement rate increases for its Ground Advantage, Priority Mail, and Parcel Select products on July 13, with the most significant hikes of around 10% for Parcel Select and Ground Advantage retail shipments. The changes aim to enhance pricing structures and boost market share while remaining competitive. Despite a recent net loss of $3.3 billion, the agency is focused on improving profitability and has seen growth in Ground Advantage. Rate changes are subject to review by the Postal Regulatory Commission.